It is built on the site of the famous Sarmisegethusa, the capital of ancient Dacia.

Of these two conquests one alone was permanent, that of Dacia.

Dacia

noun

an ancient region bounded by the Carpathians, the Tisza, and the Danube, roughly corresponding to modern Romania. United under kings from about 60 bc, it later contained the Roman province of the same name (about 105 to 270 ad)